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Question

Difficulty: EasyPower Grinders

To prevent a workpiece from being drawn into the gap between the spinning wheel and the support, what is the maximum allowable distance between the abrasive wheel and the adjustable tool rest on a bench grinder?

  1. A
    14 inch\frac{1}{4}\text{ inch}
  2. 18 inch\frac{1}{8}\text{ inch}Answer
  3. C
    12 inch\frac{1}{2}\text{ inch}
  4. D
    34 inch\frac{3}{4}\text{ inch}

Answer

The maximum allowable clearance between the tool rest and the abrasive grinding wheel is 18 inch\frac{1}{8}\text{ inch}.
Under standard workshop and OSHA safety guidelines, the tool rest on a bench or pedestal grinder must be set to a maximum distance of 18 inch\frac{1}{8}\text{ inch} from the face of the abrasive wheel. This provides firm mechanical leverage for the operator and eliminates the risk of stock getting wedged into the rotating wheel.

Step-by-Step Solution

1
Recall the safety standards and clearance specifications for stationary bench grinders.
The tool rest must be adjusted to within 18 inch\frac{1}{8}\text{ inch} (3.2 mm3.2\text{ mm}) of the wheel face.
Maintaining a tight 18 inch\frac{1}{8}\text{ inch} gap prevents the workpiece from catching, jamming, or slipping into the wheel housing, which could cause catastrophic wheel explosion or operator injury.

Key Concept

Bench Grinder Tool Rest Clearance
Estimated Time:45s
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Topics

Power Grinders

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